PCM2912A集成电路（IC）的编解码器规格书PDF中文资料

PCM2912A属于集成电路（IC）的编解码器。由德州仪器制造生产的PCM2912A编解码器编解码器是用于通过压缩和解压缩来转换数据的半导体器件。数据压缩可提高传输速度并减少存储空间。某些编解码器提供高达 32 位的分辨率，并且分别提供多达 6 个或 8 个模数转换器和数模转换器。除三角积分调制外，还有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 数据接口。

1 Features

1• On-Chip USB Interface:

– With Full-Speed Transceivers

– Fully Compliant With USB 2.0 Specification

– Certified By USB-IF

– Partially Programmable Descriptors

– Adaptive Isochronous Transfer for Playback

– Asynchronous-Isochronous Transfer for

Record

– Bus Powered

• 16-Bit Delta-Sigma ADC and DAC

• Sampling Rate:

– 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz

• On-Chip Clock Generator:

– With Single 6-MHz Clock Source

• Mono ADC with Microphone Input

– Analog Performance at VBUS = 5 V:

– THD+N: 0.01%

– SNR: 92 dB

– Dynamic Range: 90 dB

– Decimation Digital Filter

– Passband Ripple: ±0.05 dB

– Stop-Band Attenuation: –65 dB

– Single-Ended Voltage Input

– Antialiasing Filter Included

– Digital HPF Included

– Microphone Bias, Microphone Amplifier, and

Input PGA

• Stereo DAC With Headphone Output

– Analog Performance at VBUS = 5.0 V:

– THD+N: 0.01% (R L > 10 kΩ)

– THD+N: 0.02% (RL = 32 Ω)

– SNR: 92 dB

– Dynamic Range: 90 dB

– PO: 13 mW (RL = 32 Ω)

– PO: 25 mW (RL = 16 Ω)

– Oversampling Digital Filter

– Passband Ripple: ±0.1 dB

– Stop-Band Attenuation: –43 dB

– Single-Ended Voltage Output

– Analog LPF Included

– Sidetone PGA, Output PGA, and HP

Amplifier

• Multifunctions:

– Suspend, Playback, and Record Status Flag

– Microphone Amplifier, Mute, and Gain Control

• Pop/Click Noise-Free

• Single Power-Supply: 5 V Typical (VBUS)

• Package: 32-Pin TQFP

2 Applications

• USB Headset

• USB Headphone

• USB Speaker

• USB Featured Consumer Audio Product

• USB Audio Interface Box

• USB Monitor

• Video Conference System

3 Description

The PCM2912A is the Texas Instruments single-chip,

USB stereo audio codec with a USB, 2.0-compliant,

full-speed protocol controller and an analog front-end

(AFE) function for headset applications.

The USB protocol controller works with no software

code, but USB descriptors can be modified on request. The PCM2912A employs SpAct™

architecture, TI’s unique system that recovers the

audio clock from USB packet data. On-chip analog

PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.